c# - ListView Does Not save the edited record -

i using asp.net 4.5 listview using data entity populate control when edit record using c# code below not save changes. code compiles without errors , if step through code pulls record editing not save changes. here code:

    public void listview1_updateitem(int linkanalysisid)     {         linkanalysis.linkanalysi item = null;         using (laentities db = new laentities())         {             // load item here, e.g. item = mydatalayer.find(id);             item = db.linkanalysis.singleordefault(uu => uu.linkanalysisid == linkanalysisid);          if (item == null)         {             // item wasn't found             modelstate.addmodelerror("", string.format("item id {0} not found", linkanalysisid));             return;         }         tryupdatemodel(item);         if (modelstate.isvalid)         {             // save changes here, e.g. mydatalayer.savechanges();             db.savechanges();         }         }     } 

any appreciated.

after further research have edited code shown below.

     public void listview1_updateitem(int linkanalysisid)     {         linkanalysis.linkanalysi item = null;         using (laentities db = new laentities())         {             // load item here, e.g. item = mydatalayer.find(id);             item = db.linkanalysis.find(linkanalysisid);             //item = db.linkanalysis.singleordefault(uu => uu.linkanalysisid == linkanalysisid);          if (item == null)         {             // item wasn't found             modelstate.addmodelerror("", string.format("item id {0} not found", linkanalysisid));             return;         }         tryupdatemodel(item);         if (modelstate.isvalid)         {             // save changes here, e.g. mydatalayer.savechanges();             db.savechanges();         }         }     } 

i still same results code runs changes not saved database.